86078278881 has 45 divisors (see below), whose sum is σ = 149611841379. Its totient is φ = 49177025856.

The previous prime is 86078278879. The next prime is 86078278901. The reversal of 86078278881 is 18887287068.

The square root of 86078278881 is 293391.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10352045025 + 75726233856 = 101745^2 + 275184^2 .

It is not a de Polignac number, because 86078278881 - 2¹ = 86078278879 is a prime.

It is a super-2 number, since 2×86078278881² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (86078278831) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 18481305 + ... + 18485961.

Almost surely, 2^86078278881 is an apocalyptic number.

86078278881 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

86078278881 is the 293391-st square number.

86078278881 is the 146696-th centered octagonal number.

It is an amenable number.

86078278881 is a deficient number, since it is larger than the sum of its proper divisors (63533562498).

86078278881 is an frugal number, since it uses more digits than its factorization.

86078278881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9340 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 63.

The spelling of 86078278881 in words is "eighty-six billion, seventy-eight million, two hundred seventy-eight thousand, eight hundred eighty-one".